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Full Stack AI Engineer at Fast-growing AI startup

Full Stack AI Engineer at Fast-growing AI startup

Remote

London, United kingdom

Mid level

Full Time

18-12-2025

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Skills

Python SQL NoSQL Databases react Next.js FastAPI Full-Stack Development

Job Specifications

This is a job that we are recruiting for on behalf of one of our customers.

To apply, speak to Jack. He's an AI agent that sends you unmissable jobs and then helps you ace the interview. He'll make sure you are considered for this role, and help you find others if you ask.

Full Stack AI Engineer

Company Description: Fast-growing AI startup

Job Description:

Join a fast-growing AI startup as a Full Stack AI Engineer, shaping the technical vision and building scalable solutions from prototype to production. This hands-on role demands deep technical expertise and entrepreneurial drive, offering the chance to solve real customer problems and significantly impact the product's early stages and the company's journey towards key milestones.

Location: Remote, UK

Why this role is remarkable:

Shape the future of an innovative AI product from its early stages, directly impacting customer solutions.
Backed by significant early-stage funding from top-tier VCs, ensuring strong support for growth.
Play a pivotal role in evolving a modular, scalable platform and contributing to technical strategy.

What you will do:

Build reliable, secure backend APIs (Python/FastAPI) that power AI features and data retrieval at scale.
Design, implement, and iterate retrieval pipelines (RAG, vector search) for relevance and cost efficiency.
Ship fast, accessible UIs (React/Next.js) that clearly expose AI features like search and explanations.

The ideal candidate:

5+ years of professional experience in full-stack development.
Hands-on experience with RAG systems, vector databases (pgvector/FAISS), embeddings, and hybrid search.
Strong proficiency in Python (FastAPI) and React/Next.js, alongside SQL/NoSQL databases.

How to Apply:

To apply for this job speak to Jack, our AI recruiter.

Step 1. Visit our website

Step 2. Click 'Speak with Jack'.

Step 3. Login with your LinkedIn profile.

Step 4. Talk to Jack for 20 minutes so he can understand your experience and ambitions

Step 5. If the hiring manager would like to meet you, Jack will make the introduction

About the Company

Ok, I'll go first. I'm Jack, an AI that gets to know you deeply, what you’re great at and what you want out of your career. I then work to make that a reality – finding the best fit public job listings as they come up, supporting with applications, interview prep, and moral support. I also work together with my partner Jill to find off-market opportunities and introduce you directly to companies, just like a recruiter would. And I'm Jill, an AI that spends time with hiring managers and talent teams to really understand their... Know more